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EP0024470A3 - Method and apparatus for compensating for sensitivity variations in an image sensor - Google Patents

Method and apparatus for compensating for sensitivity variations in an image sensor Download PDF

Info

Publication number
EP0024470A3
EP0024470A3 EP80102225A EP80102225A EP0024470A3 EP 0024470 A3 EP0024470 A3 EP 0024470A3 EP 80102225 A EP80102225 A EP 80102225A EP 80102225 A EP80102225 A EP 80102225A EP 0024470 A3 EP0024470 A3 EP 0024470A3
Authority
EP
European Patent Office
Prior art keywords
image sensor
compensating
correction value
video signal
sensitivity variations
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
EP80102225A
Other languages
German (de)
French (fr)
Other versions
EP0024470A2 (en
Inventor
Wayne W. Frame
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ball Corp
Original Assignee
Ball Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ball Corp filed Critical Ball Corp
Publication of EP0024470A2 publication Critical patent/EP0024470A2/en
Publication of EP0024470A3 publication Critical patent/EP0024470A3/en
Ceased legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N25/00—Circuitry of solid-state image sensors [SSIS]; Control thereof
    • H04N25/60—Noise processing, e.g. detecting, correcting, reducing or removing noise
    • H04N25/63—Noise processing, e.g. detecting, correcting, reducing or removing noise applied to dark current
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
    • H04N23/80—Camera processing pipelines; Components thereof
    • H04N23/81—Camera processing pipelines; Components thereof for suppressing or minimising disturbance in the image signal generation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N25/00—Circuitry of solid-state image sensors [SSIS]; Control thereof
    • H04N25/60—Noise processing, e.g. detecting, correcting, reducing or removing noise
    • H04N25/67—Noise processing, e.g. detecting, correcting, reducing or removing noise applied to fixed-pattern noise, e.g. non-uniformity of response
    • H04N25/671—Noise processing, e.g. detecting, correcting, reducing or removing noise applied to fixed-pattern noise, e.g. non-uniformity of response for non-uniformity detection or correction
    • H04N25/673—Noise processing, e.g. detecting, correcting, reducing or removing noise applied to fixed-pattern noise, e.g. non-uniformity of response for non-uniformity detection or correction by using reference sources

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Transforming Light Signals Into Electric Signals (AREA)
  • Photometry And Measurement Of Optical Pulse Characteristics (AREA)
  • Picture Signal Circuits (AREA)

Abstract

A method and apparatus for compensating for sensitivity variations in image sensors. The sensing surface of an image sensor is arbitrarily divided into a plurality of detection ele­ ments. A field of uniform brightness is presented to the image sensor and the video signal from each detection element is multiplied by a corresponding correction value. The altered video signal is compared to a reference and the correspond­ ing correction value is either incremented or decremented so that the altered video signal approaches the reference. During operation, the video data received from each detection ele­ ment is multiplied by the corresponding correction value to produce corrected video data.
EP80102225A 1979-08-21 1980-04-25 Method and apparatus for compensating for sensitivity variations in an image sensor Ceased EP0024470A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US6846879A 1979-08-21 1979-08-21
US68468 2002-02-05

Publications (2)

Publication Number Publication Date
EP0024470A2 EP0024470A2 (en) 1981-03-11
EP0024470A3 true EP0024470A3 (en) 1981-05-06

Family

ID=22082768

Family Applications (1)

Application Number Title Priority Date Filing Date
EP80102225A Ceased EP0024470A3 (en) 1979-08-21 1980-04-25 Method and apparatus for compensating for sensitivity variations in an image sensor

Country Status (2)

Country Link
EP (1) EP0024470A3 (en)
JP (1) JPS5631277A (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5810032A (en) * 1981-07-09 1983-01-20 オリンパス光学工業株式会社 Endoscope
FR2525844A1 (en) * 1982-04-27 1983-10-28 Thomson Csf METHOD AND APPARATUS FOR CORRECTING TELEVISION VIEWING SIGNALS
JPS58220797A (en) * 1982-06-18 1983-12-22 Konishiroku Photo Ind Co Ltd Base for lithographic printing plate and production thereof
FR2548498B1 (en) * 1983-06-28 1985-10-18 Thomson Csf METHOD FOR CORRECTING THE LEVEL AT THE OUTPUT OF A LOAD TRANSFER DEVICE AND DEVICE FOR IMPLEMENTING IT
KR0181157B1 (en) 1996-04-10 1999-05-01 김광호 Image processing apparatus for shading correction
GB2314227B (en) * 1996-06-14 1998-12-23 Simage Oy Calibration method and system for imaging devices
WO2001042771A1 (en) * 1999-12-11 2001-06-14 Qualico Gmbh Device for detecting characteristics of a moving paper web, said device comprising a polychromator and an ir detector matrix

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3743772A (en) * 1969-11-12 1973-07-03 Meldreth Electronics Ltd Image analysing
US3902011A (en) * 1969-11-12 1975-08-26 Meldreth Electronics Limited Image analysing
US3919473A (en) * 1974-01-02 1975-11-11 Corning Glass Works Signal correction system
US3949162A (en) * 1974-02-25 1976-04-06 Actron Industries, Inc. Detector array fixed-pattern noise compensation
US4032975A (en) * 1974-02-25 1977-06-28 Mcdonnell Douglas Corporation Detector array gain compensation
GB1526801A (en) * 1976-01-08 1978-10-04 British Broadcasting Corp Compensating interference from solid state image sensing devices

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3743772A (en) * 1969-11-12 1973-07-03 Meldreth Electronics Ltd Image analysing
US3902011A (en) * 1969-11-12 1975-08-26 Meldreth Electronics Limited Image analysing
US3919473A (en) * 1974-01-02 1975-11-11 Corning Glass Works Signal correction system
US3949162A (en) * 1974-02-25 1976-04-06 Actron Industries, Inc. Detector array fixed-pattern noise compensation
US4032975A (en) * 1974-02-25 1977-06-28 Mcdonnell Douglas Corporation Detector array gain compensation
GB1526801A (en) * 1976-01-08 1978-10-04 British Broadcasting Corp Compensating interference from solid state image sensing devices

Also Published As

Publication number Publication date
EP0024470A2 (en) 1981-03-11
JPS5631277A (en) 1981-03-30

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Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

PUAL Search report despatched

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AK Designated contracting states

Designated state(s): DE FR GB NL

AK Designated contracting states

Designated state(s): DE FR GB NL

17P Request for examination filed

Effective date: 19810907

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION HAS BEEN REFUSED

18R Application refused

Effective date: 19851105

RIN1 Information on inventor provided before grant (corrected)

Inventor name: FRAME, WAYNE W.